Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 1 (Q.No. 2)
2.
If h is the difference in level between end points separated by l, then the slope correction is 
. The second term may be neglected if the value of h in a 20 m distance is less than
. The second term may be neglected if the value of h in a 20 m distance is less than
m1 m
2 m
3 m
Discussion:
67 comments Page 2 of 7.
AKSHAY VASHISHT said:
1 decade ago
Second term is neglected for slope less than 10%.
Slope for given problem for:
C) (2/20)*100 = 10%.
D) (3/20)*100 = 15%.
So for h = 2 m or less it is neglected.
And for h = 3 m it will be taken into account.
Slope for given problem for:
C) (2/20)*100 = 10%.
D) (3/20)*100 = 15%.
So for h = 2 m or less it is neglected.
And for h = 3 m it will be taken into account.
Pratap said:
8 years ago
For slope >=20%, the 2nd term can be neglected.
Taking minimum slope as 20%,
Slope = 20%
or, h/d =20%
or, h/20 = 20%
or, h = 20 * 20%
or, h = 4.
Since the value nearer to 4 is 3, so the right answer is 3.
Taking minimum slope as 20%,
Slope = 20%
or, h/d =20%
or, h/20 = 20%
or, h = 20 * 20%
or, h = 4.
Since the value nearer to 4 is 3, so the right answer is 3.
Sanjay said:
8 years ago
Here all the options are correct as we apply them in the second term because the answer is in 10^-3.
So it is neglected. As we take to consider the highest value always so 3 is the correct answer.
So it is neglected. As we take to consider the highest value always so 3 is the correct answer.
Vin said:
6 years ago
H should be less than 3.
Even if it is substituted in the formula, the second term will get negligible (very small number-even neglecting the term will not affect the answer).
Even if it is substituted in the formula, the second term will get negligible (very small number-even neglecting the term will not affect the answer).
Khagendra said:
5 years ago
For slope (M) up to 20%.
Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
Here the nearest one is 3m.
So 3m is the appropriate answer.
Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
Here the nearest one is 3m.
So 3m is the appropriate answer.
(17)
Nandhu said:
5 years ago
The second term can be negleted only if the slopes flatter than 1 in 25..
That means 4%.
i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.
So option A is right.
That means 4%.
i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.
So option A is right.
(4)
Mayank said:
8 years ago
FOR SLOPE >=20% THEN 2ND TERM NEGLECTED.
Take min slope 20%,
SLOPE h^2/2l = 20%,
h^2/2 * 20 = 20%,
h^2 = 20% * 40,
h^2 = 8.
h approximately 2.83 which is nearly to 3.
Take min slope 20%,
SLOPE h^2/2l = 20%,
h^2/2 * 20 = 20%,
h^2 = 20% * 40,
h^2 = 8.
h approximately 2.83 which is nearly to 3.
Tapas Kumar Dinda said:
6 years ago
H^4/8L^3 = 0 or near to 0 which is neglected to measure, when I put h<3 (1/2,1,2), results are below 1mm, which is hard to measurable. So, 3 is correct.
P.ayub said:
8 years ago
If the second term is neglected the slope correction falls under <=20%.
So it may be taken as h^2/2l=20%.
h^2/2*20=0.2.
h=2.82<3.
So answer is 3.
So it may be taken as h^2/2l=20%.
h^2/2*20=0.2.
h=2.82<3.
So answer is 3.
NARDOS TEFERI said:
2 years ago
For slope (M) up to 20%.
According to me, the solution is;
Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
According to me, the solution is;
Slope correction(Sc) = h^2/(2l).
Here d = 20m,
M = h/d,
0.2 = h/20.
H = 0.2 * 20 = 4m.
(13)
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